WILLIAMSWARN BrewKeg50, User Manual

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USER GUIDE

WilliamsWarn brewers tend to like quite highly 
carbonated beers so we’ve targeted 6.4g/L in a 
BrewKeg50

TM

 at 1ºC. This means, as you can see 

on this graph, we need a pressure of 1.1 bar during 
dispense. So that’s why we set 1.1 bar pressure on 
the low pressure gauge on our CO

2

 supply regulator.

Adjusting Carbonation 

Carbonation

g/L CO

2

Pressure on CO

2

 Supply for 

Clarification and dispense (1ºC/34ºF)

High

6.4 g/L

1.10 bar

High

6.2 g/L

1.03 bar

High

6.0 g/L

0.96 bar

Moderate

5.8 g/L

0.90 bar

Moderate

5.6 g/L

0.83 bar

Average

5.4 g/L

0.76 bar

Average

5.2 g/L

0.70 bar

Average

5.0 g/L

0.63 bar

Low

4.8 g/L

0.56 bar

Low

4.6 g/L

0.49 bar

If you find this high carbonation level is a little bit too 
high for your personal preference, or you are getting 
a little too much foam out of the draft beer tap, 
then for your next brews just target a lower dispense 
pressure. For example 0.9 bar will give you 5.8g/L 
carbon dioxide. So that is what you would set on 
the low pressure gauge on your CO

2

 supply. During 

fermentation set your VPRV to release at about 0.4 
bar higher than the dispense pressure you’ve chosen 
to allow for a pressure drop during cooling and to 
have a little excess carbonation in the beer before 
clarification. Also, when clarifying you will need to 
reduce the vessel pressure to 0.5 bar (7.25psi) below 
the dispense pressure (not the fermented pressure) to 
introduce the Clarification Agent.

Carbonation for Warmer Beverages 

Carbonation

g/L CO

2

Pressure on CO

2

 Supply for 

Clarification and dispense (5ºC/41ºF)

High

6.4 g/L

1.41 bar

High

6.2 g/L

1.34 bar

High

6.0 g/L

1.26 bar

Moderate

5.8 g/L

1.19 bar

Moderate

5.6 g/L

1.11 bar

Average

5.4 g/L

1.03 bar

Average

5.2 g/L

0.96 bar

Average

5.0 g/L

0.88 bar

Low

4.8 g/L

0.81 bar

Low

4.6 g/L

0.73 bar

Please note, if you prefer a warmer beverage 
temperature at dispense, for the same amount  
of carbonation you need more pressure. So  
choose the amount of carbonation you want  
and use the graph on the left to set the dispense 
pressure you need. If you find your beverage  
is over carbonated to your personal taste or  
maybe over foaming through your beverage  
tap system, put the pressure gauge back on  
and open the VPRV up to a lower pressure  
and let it stand overnight. This will reduce  
the carbonation level. If you’re short of time,  
you could try shaking the keg a little bit to help 
force the CO

2

 out of the beverage.

A Simple Rule of Thumb

If you like the level of carbonation that 1.1 bar 
(16 psi) gives you at 1ºC (34ºF), but would like  
a warmer beer, a simple rule of thumb is to try  
1.2 bar at 2ºC (35.6ºF), or 1.3 bar at 3ºC (37ºF),  

or 1.4 bar at 4ºC (39ºF), or 1.5 bar at 5ºC (41ºF).  
This works well for those who like a high carbonation 
level and it will not result in foaming of the beer out 
the tap when the beer is poured.